Granted Patent
Utility
US 6,680,035 · App. 09/864,993
Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores
Inventors:
J. Carlos Arroyo, David Neudorf
Patented Case
View Patent ↗
Granted: Jan 20, 2004
Filed: May 24, 2001
Inventors
J. Carlos Arroyo
David Neudorf
Assignee (at issue)
BHP Minerals International Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.